Improved apparatus fop, condensing and evaporating



1. 1. MILLER.

Evaporatng Pan.

No. 37,258. Patented Dec. 23, 1862.

UNITED STATEs ETENT @Erica JOHN JACOB MILLER, OF CHICAGO, ILLINOIS, ASSIGNOR TO IIIMSELF AND ERNST PILUSSING,

or sAME PLACE.

llVlFRls/D APPARATUS FOR CitlD-.INSING AND EVAPRATING.

Specilication forming part of Letters Patent No. 37.25@ dated December 23, 1862.

vTo (all wiz/0m t may concern.-

Be it known that I, J'o'uN .limon MILLER, of Chicago, in the county of Cook and State of' Illinois, have invented a new and uscrt'ul Improvement in Apparatus for Condensing, lllvaporating, or Coolingllluids; and I do hereby declare the following to be a full and exact description of the same, reference being had to the accompauyi ng drawi ng, making part of this speeilication, and being a vertical scction of an apparatusillustratingmyinvention.

The subject of my'said invention is an apparatus consisting of a series ol' dishes or pans placed in alteri1ately-revcrsed positions upon a rcwolving` shaft within a close vessel, on the exterior of which may be placed, when needl'ul, 'a jacket or coil for the reception and eirculation oi" a heating or cooling medium.

lo enable others skilled in the art to which my invention appertains to fully understand and use the same, I will proceed to describe its construction and operation.

A is a tight vessel adapted to resist a heavy internal or external pressure.

Il is a vertical shalt resting in astcp, C, and passing out at top through a stuiling-box, c.

D lil are a series ot' pans, of' unequal size, secured to the shaft B in alterinitely-reversed positions, the margins of the inverted pans D being within the margins of the pans E, as clearly shown in the drawing.

e c are apertures in the bottoms of the pans E, for the passage of liquids, as hereinafter described.

d d d are short tubes placed upon the shaft Il, between the pans D and 1G, to keep them the required distance apart.

M is a collar secured to the shaft I3 by means of a set-screw, m.

Nisanut, either attached to or placed above the upper pan, D, and threaded upon the shalt B, near the upper end of the latter. The pans are clamped between the nut N and collar M, so as to be made to rotate with the shaft Il, but the attaclnnent is such as to permit the ready removal and separation of all the pans and tubes for cleansing purposes.

F G II I are ingress or egress cocks or Valves, the use of which will be presently explained.

.I is a spiral coil or jacket, which for some purposes may be placed around the vessel A. rlhe casing ol" the saidy jacket may be formed in two paris, held together by ilanges and bolts, as shown at j.

li L are ingress and egress apertures to the coil or jacket J'.

The rotation of the shalt D and pans D E may be effected bya pulley, b, orin any other suitable manner.

For the purposes of a condenser the apparatus is used as follows: A rotary motion is imparted to the shaft B, carrying with it the pans D E. Steam is introduced through the cock F, the cock I being opened in first using the apparatus for ventage, to permit the entrance of steam within the condensing-chanr ber A. rlhe cock I is then closed and con- (lensing-water injected through thel cock II, which water, falling upon the upper inverted pan D, is thereby distributed over the surface ofthe upper one of the paus E. Flowing inward toward the center, it falls through the apertures c c upon the second of the pans D p spreading over the surface ofthe same, and is again, by centrifugal action, thrown off ina shower into the second of the pans E, and so on throughout the series'. It will be seen that the steam permeating the entire interior of the chamber is cooled by contact with the under surface of all the pans, over the upper surface of which water is ilowing, and also by direct contact with the water upon the upperv surfaces ot' the pans, and still more minutely as it falls in repeated showers from pan to pan. The exposure of the steam to so extended a cooling-snriace of both water and meta-l results in its rapid and economical condensation. 'Water ot' condensation is drawn oft through the cock G.

The manner of using the apparatus for the purpose of an evaporator is as follows: The air is extracted through the cock I by means of an air pump or fan, and a partial vacuum maintained within the chamber A. The pans are rotated, as before, and liquid to be evaporated is introduced through the cock II, which liquid is, by reason of the form and rotation ot' the pans, distributed over their entire surface and delivered in repeated showers from pan to pan,as previously explained in the case of t]iccondensing-water. Ahightemperature is maintained within the chamber A by means of steam introduced at K, and passing throughout the coil J to the exitlport L, which, with the minute separation and diffusion of the liquid, efiects the rapid evaporation of the latter. After having undergone the necessary evaporation, the liquid is drawn off through the cock G. The cock F may be used to draw off` any excess of liquid in ease of the pump injecting a larger quantity than the apparatus can operate upon to advantage; or the said cock may be used in addition to the cock G, or dispensed with entirely.

For the purpose of cooling liquors, the apparatus is used in a manner similar to that last described, excepting that a cooling instead of a heating fluid is passed through the coil J.

I do not confine myself to any specic construction, number, or location of the induc` tion and eduction ports, nor to the number or precise form of the pans D, or to any specific means of rotating the same. The centrifugal action is only applied in order to distribute the liquid equally over the plates, and must not be so strong as to overcome the weight of the liquid or interfere with its passage th rough. the apertures in the concave pans.

In case of the evaporator being used in saline-works, the plates or pans will be made of Wood, glass, or other material not subject to corrosion.

Having thus described myinvention, what I claim therein as new, and desire to secure by Letters Patent, is-

l. The combination of the closed vessel A and alternately concave and convex rotating pans D and E, with suitable induction and eduction ports, the Whole being arranged to operate substantially as and for the purposes set forth.

2. The combination of the surrounding jacket or coil J with the said closed vessel and pans, substantially as and forthe objects specified.

3. Securing the pans D and E upon the shaft B by means ofthe collar M, tubes d, and clamping-nut N, substantially as and for the purposes described.

JOHN JACOB MILLER.

Witnesses:

J oHN G. SHORTALL, ELY H. BREYTsrRAAK. 

